/*
 * Copyright (c) 2013-2019 Huawei Technologies Co., Ltd. All rights reserved.
 * Copyright (c) 2020-2021 Huawei Device Co., Ltd. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification,
 * are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice, this list of
 * conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright notice, this list
 * of conditions and the following disclaimer in the documentation and/or other materials
 * provided with the distribution.
 *
 * 3. Neither the name of the copyright holder nor the names of its contributors may be used
 * to endorse or promote products derived from this software without specific prior written
 * permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include "It_posix_ipc.h"

#define SHMSIZE 128
#define SHM_USES_TIMES 1000

static UINT32 Testcase(VOID)
{
    int shmid;
    int ret;
    int status;
    pid_t pid;
    const char *shStr = "0123456789";
    void *shmp = NULL;
    sem_t *data = NULL;
    sem_t *space = NULL;
    key_t key;

    key = ftok(".", 1);
    ICUNIT_ASSERT_NOT_EQUAL(key, -1, key);

    shmid  = shmget(key, sizeof(sem_t), IPC_CREAT | 0666);
    ICUNIT_ASSERT_NOT_EQUAL(shmid, -1, shmid);

    shmp = (sem_t*)shmat(shmid, NULL, 0);
    ICUNIT_ASSERT_NOT_EQUAL(shmp, (void *)-1, shmp);
    data = (sem_t*)shmp;

    ret = sem_init(data, 1, 0);
    ICUNIT_GOTO_NOT_EQUAL(ret, -1, ret, EXIT);

    key = ftok(".", 2);
    ICUNIT_GOTO_NOT_EQUAL(key, -1, key, EXIT1);

    shmid  = shmget(key, sizeof(sem_t), IPC_CREAT | 0666);
    ICUNIT_GOTO_NOT_EQUAL(shmid, -1, shmid, EXIT1);

    shmp = (sem_t*)shmat(shmid, NULL, 0);
    ICUNIT_GOTO_NOT_EQUAL(shmp, (void *)-1, shmp, EXIT1);
    space = (sem_t*)shmp;

    ret = sem_init(space, 1, 1);
    ICUNIT_GOTO_NOT_EQUAL(ret, -1, ret, EXIT2);

    key = ftok(".", 3);
    ICUNIT_GOTO_NOT_EQUAL(key, -1, key, EXIT3);

    shmid  = shmget(key, SHMSIZE, IPC_CREAT | 0666);
    ICUNIT_GOTO_NOT_EQUAL(shmid, -1, shmid, EXIT3);

    pid = fork();
    if (pid == 0) {
        shmid  = shmget(key, SHMSIZE, IPC_CREAT | 0666);
        ICUNIT_ASSERT_NOT_EQUAL(shmid, -1, shmid);

        shmp = shmat(shmid, NULL, 0);
        ICUNIT_ASSERT_NOT_EQUAL(shmp, (void *)-1, shmp);

        for (int i = 0; i < SHM_USES_TIMES; i++) {
            sem_wait(space);
            bzero(shmp, SHMSIZE);
            snprintf((char *)shmp, SHMSIZE, shStr);
            sem_post(data);
        }

        ret = shmdt(shmp);
        ICUNIT_ASSERT_NOT_EQUAL(ret, -1, ret);

        exit(0);
    } else {
        shmid  = shmget(key, SHMSIZE, IPC_CREAT | 0666);
        ICUNIT_GOTO_NOT_EQUAL(shmid, -1, shmid, EXIT3);

        void *shmp = shmat(shmid, NULL, 0);
        ICUNIT_GOTO_NOT_EQUAL(shmp, (void *)-1, shmp, EXIT4);

        for (int i = 0;i < SHM_USES_TIMES; i++) {
            sem_wait(data);
            ICUNIT_GOTO_STRING_EQUAL((char *)shmp, shStr, (char *)shmp, EXIT4);
            sem_post(space);
        }

        ret = waitpid(pid, &status, 0);
        ICUNIT_GOTO_EQUAL(ret, pid, ret, EXIT4);

        status = WEXITSTATUS(status);
        ICUNIT_GOTO_EQUAL(status, 0, status, EXIT4);

        ret= shmdt(shmp);
        ICUNIT_GOTO_NOT_EQUAL(ret, -1, ret, EXIT4);

        ret = sem_destroy(data);
        ICUNIT_GOTO_EQUAL(ret, 0, ret, EXIT3);

        shmdt(data);
        ICUNIT_GOTO_EQUAL(ret, 0, ret, EXIT2);

        ret = sem_destroy(space);
        ICUNIT_GOTO_EQUAL(ret, 0, ret, EXIT1);

        shmdt(space);
        ICUNIT_GOTO_EQUAL(ret, 0, ret, EXIT);
    }

EXIT4:
    shmdt(shmp);
EXIT3:
    sem_destroy(space);
EXIT2:
    shmdt(space);
EXIT1:
    sem_destroy(data);
EXIT:
    shmdt(data);

    return 0;
}

void ItPerfShm002(void)
{
    TEST_ADD_CASE("ItPerfShm002", Testcase, TEST_POSIX, TEST_IPC, TEST_LEVEL0, TEST_FUNCTION);
}
